/* bzflag
 * Copyright (c) 1993-2020 Tim Riker
 *
 * This package is free software;  you can redistribute it and/or
 * modify it under the terms of the license found in the file
 * named COPYING that should have accompanied this file.
 *
 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef __PING_H__
#define __PING_H__

#include "common.h"

/* system headers */
#include <fstream>

/* common interface headers */
#include "Address.h"
#include "Pack.h"


// 8 uint16's and 13 uint8's hex encoded
static const int    PingPacketHexPackedSize = 4 * 8 + 2 * 13;


/** PingPacket:
 *  Encapsulates server `ping' info.
 */
class PingPacket
{
public:
    PingPacket();
    ~PingPacket();

    bool        read(int fd, struct sockaddr_in*);
    bool        write(int fd, const struct sockaddr_in*) const;
    bool        waitForReply(int fd, const Address& from,
                             int millisecondsToBlock = 0);

    void*       pack(void*, const char* version) const;
    const void*     unpack(const void*, char* version);

    void        packHex(char*) const;
    void        unpackHex(char*);
    void        zeroPlayerCounts();
    void        writeToFile(std::ostream& out) const;
    bool        readFromFile(std::istream& in);
    static void     repackHexPlayerCounts(char*, int* counts);

    static bool isRequest(int fd, struct sockaddr_in*);
    static bool sendRequest(int fd, const struct sockaddr_in*);

public:
    ServerId    serverId;
    Address     sourceAddr;
    uint16_t    gameOptions;
    uint16_t    gameType;
    uint16_t    maxShots;
    uint16_t    shakeWins;
    uint16_t    shakeTimeout;       // 1/10ths of second
    uint16_t    maxPlayerScore;
    uint16_t    maxTeamScore;
    uint16_t    maxTime;            // seconds
    uint8_t     maxPlayers;
    uint8_t     rogueCount;
    uint8_t     rogueMax;
    uint8_t     redCount;
    uint8_t     redMax;
    uint8_t     greenCount;
    uint8_t     greenMax;
    uint8_t     blueCount;
    uint8_t     blueMax;
    uint8_t     purpleCount;
    uint8_t     purpleMax;
    uint8_t     observerCount;
    uint8_t     observerMax;

private:
    static int      hex2bin(char);
    static char     bin2hex(int);
    static char*    packHex16(char*, uint16_t);
    static char*    unpackHex16(char*, uint16_t&);
    static char*    packHex8(char*, uint8_t);
    static char*    unpackHex8(char*, uint8_t&);

private:
    static const int    PacketSize;
};


#endif /* __PING_H__ */

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